/[escript]/trunk/finley/src/Mesh_read.c
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Contents of /trunk/finley/src/Mesh_read.c

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Revision 126 - (show annotations)
Fri Jul 22 03:53:08 2005 UTC (14 years, 4 months ago) by jgs
Original Path: trunk/esys2/finley/src/finleyC/Mesh_read.c
File MIME type: text/plain
File size: 7354 byte(s)
Merge of development branch back to main trunk on 2005-07-22

1 /**************************************************************/
2
3 /* Finley: read mesh */
4
5 /**************************************************************/
6
7 /* Copyrights by ACcESS Australia 2003/04 */
8 /* Author: gross@access.edu.au */
9 /* Version: $Id$ */
10
11 /**************************************************************/
12
13 #include "Finley.h"
14 #include "Mesh.h"
15
16 /**************************************************************/
17
18 /* reads a mesh from a Finley file of name fname */
19
20 Finley_Mesh* Finley_Mesh_read(char* fname,index_t order) {
21
22 dim_t numNodes, numDim, numEle, i0, i1;
23 char name[LenString_MAX],element_type[LenString_MAX];
24 Finley_NodeFile *nodes_p=NULL;
25 double time0=Finley_timer();
26
27 /* get file handle */
28 FILE * fileHandle_p = fopen(fname, "r");
29 if (fileHandle_p==NULL) {
30 Finley_ErrorCode=IO_ERROR;
31 sprintf(Finley_ErrorMsg,"Opening file %s for reading failed.",fname);
32 return NULL;
33 }
34
35 /* read header */
36 fscanf(fileHandle_p, "%63[^\n]", name);
37
38 /* get the nodes */
39
40 fscanf(fileHandle_p, "%1d%*s %d\n", &numDim,&numNodes);
41 nodes_p=Finley_NodeFile_alloc(numDim);
42 if (Finley_ErrorCode!=NO_ERROR) return NULL;
43 Finley_NodeFile_allocTable(nodes_p, numNodes);
44 if (Finley_ErrorCode!=NO_ERROR) return NULL;
45
46 if (1 == numDim) {
47 for (i0 = 0; i0 < numNodes; i0++)
48 fscanf(fileHandle_p, "%d %d %d %le\n", &nodes_p->Id[i0],
49 &nodes_p->degreeOfFreedom[i0], &nodes_p->Tag[i0],
50 &nodes_p->Coordinates[INDEX2(0,i0,numDim)]);
51 } else if (2 == numDim) {
52 for (i0 = 0; i0 < numNodes; i0++)
53 fscanf(fileHandle_p, "%d %d %d %le %le\n", &nodes_p->Id[i0],
54 &nodes_p->degreeOfFreedom[i0], &nodes_p->Tag[i0],
55 &nodes_p->Coordinates[INDEX2(0,i0,numDim)],
56 &nodes_p->Coordinates[INDEX2(1,i0,numDim)]);
57 } else if (3 == numDim) {
58 for (i0 = 0; i0 < numNodes; i0++)
59 fscanf(fileHandle_p, "%d %d %d %le %le %le\n", &nodes_p->Id[i0],
60 &nodes_p->degreeOfFreedom[i0], &nodes_p->Tag[i0],
61 &nodes_p->Coordinates[INDEX2(0,i0,numDim)],
62 &nodes_p->Coordinates[INDEX2(1,i0,numDim)],
63 &nodes_p->Coordinates[INDEX2(2,i0,numDim)]);
64 } /* if else else */
65
66 /* get the element type */
67
68 fscanf(fileHandle_p, "%s %d\n", element_type, &numEle);
69 ElementTypeId typeID=Finley_RefElement_getTypeId(element_type);
70 if (typeID==NoType) {
71 Finley_ErrorCode=VALUE_ERROR;
72 sprintf(Finley_ErrorMsg,"Unidentified element type %s",element_type);
73 return NULL;
74 }
75
76 /* allocate mesh */
77
78 Finley_Mesh * mesh_p =Finley_Mesh_alloc(name,numDim,order);
79 if (Finley_ErrorCode!=NO_ERROR) return NULL;
80 mesh_p->Nodes=nodes_p;
81
82 /* read the elements */
83 mesh_p->Elements=Finley_ElementFile_alloc(typeID,mesh_p->order);
84 Finley_ElementFile_allocTable(mesh_p->Elements, numEle);
85 mesh_p->Elements->minColor=0;
86 mesh_p->Elements->maxColor=numEle-1;
87 for (i0 = 0; i0 < numEle; i0++) {
88 fscanf(fileHandle_p, "%d %d", &mesh_p->Elements->Id[i0], &mesh_p->Elements->Tag[i0]);
89 mesh_p->Elements->Color[i0]=i0;
90 for (i1 = 0; i1 < mesh_p->Elements->ReferenceElement->Type->numNodes; i1++) {
91 fscanf(fileHandle_p, " %d",
92 &mesh_p->Elements->Nodes[INDEX2(i1, i0, mesh_p->Elements->ReferenceElement->Type->numNodes)]);
93 } /* for i1 */
94 fscanf(fileHandle_p, "\n");
95 } /* for i0 */
96
97 /* get the face elements */
98 fscanf(fileHandle_p, "%s %d\n", element_type, &numEle);
99 ElementTypeId faceTypeID=Finley_RefElement_getTypeId(element_type);
100 if (faceTypeID==NoType) {
101 Finley_ErrorCode=VALUE_ERROR;
102 sprintf(Finley_ErrorMsg,"Unidentified element type %s for face elements",element_type);
103 return NULL;
104 }
105 mesh_p->FaceElements=Finley_ElementFile_alloc(faceTypeID,mesh_p->order);
106 Finley_ElementFile_allocTable(mesh_p->FaceElements, numEle);
107 mesh_p->FaceElements->minColor=0;
108 mesh_p->FaceElements->maxColor=numEle-1;
109 for (i0 = 0; i0 < numEle; i0++) {
110 fscanf(fileHandle_p, "%d %d", &mesh_p->FaceElements->Id[i0], &mesh_p->FaceElements->Tag[i0]);
111 mesh_p->FaceElements->Color[i0]=i0;
112 for (i1 = 0; i1 < mesh_p->FaceElements->ReferenceElement->Type->numNodes; i1++) {
113 fscanf(fileHandle_p, " %d",
114 &mesh_p->FaceElements->Nodes[INDEX2(i1, i0, mesh_p->FaceElements->ReferenceElement->Type->numNodes)]);
115 } /* for i1 */
116 fscanf(fileHandle_p, "\n");
117 } /* for i0 */
118
119 /* get the Contact face element */
120 fscanf(fileHandle_p, "%s %d\n", element_type, &numEle);
121 ElementTypeId contactTypeID=Finley_RefElement_getTypeId(element_type);
122 if (contactTypeID==NoType) {
123 Finley_ErrorCode=VALUE_ERROR;
124 sprintf(Finley_ErrorMsg,"Unidentified element type %s for contact elements",element_type);
125 return NULL;
126 }
127 mesh_p->ContactElements=Finley_ElementFile_alloc(contactTypeID,mesh_p->order);
128 Finley_ElementFile_allocTable(mesh_p->ContactElements, numEle);
129 mesh_p->ContactElements->minColor=0;
130 mesh_p->ContactElements->maxColor=numEle-1;
131 for (i0 = 0; i0 < numEle; i0++) {
132 fscanf(fileHandle_p, "%d %d", &mesh_p->ContactElements->Id[i0], &mesh_p->ContactElements->Tag[i0]);
133 mesh_p->ContactElements->Color[i0]=i0;
134 for (i1 = 0; i1 < mesh_p->ContactElements->ReferenceElement->Type->numNodes; i1++) {
135 fscanf(fileHandle_p, " %d",
136 &mesh_p->ContactElements->Nodes[INDEX2(i1, i0, mesh_p->ContactElements->ReferenceElement->Type->numNodes)]);
137 } /* for i1 */
138 fscanf(fileHandle_p, "\n");
139 } /* for i0 */
140
141 /* get the nodal element */
142 fscanf(fileHandle_p, "%s %d\n", element_type, &numEle);
143 ElementTypeId pointTypeID=Finley_RefElement_getTypeId(element_type);
144 if (pointTypeID==NoType) {
145 Finley_ErrorCode=VALUE_ERROR;
146 sprintf(Finley_ErrorMsg,"Unidentified element type %s for points",element_type);
147 return NULL;
148 }
149 mesh_p->Points=Finley_ElementFile_alloc(pointTypeID,mesh_p->order);
150
151 Finley_ElementFile_allocTable(mesh_p->Points, numEle);
152 mesh_p->Points->minColor=0;
153 mesh_p->Points->maxColor=numEle-1;
154 for (i0 = 0; i0 < numEle; i0++) {
155 fscanf(fileHandle_p, "%d %d", &mesh_p->Points->Id[i0], &mesh_p->Points->Tag[i0]);
156 mesh_p->Points->Color[i0]=i0;
157 for (i1 = 0; i1 < mesh_p->Points->ReferenceElement->Type->numNodes; i1++) {
158 fscanf(fileHandle_p, " %d",
159 &mesh_p->Points->Nodes[INDEX2(i1, i0, mesh_p->Points->ReferenceElement->Type->numNodes)]);
160 } /* for i1 */
161 fscanf(fileHandle_p, "\n");
162 } /* for i0 */
163
164
165 /* close file */
166
167 fclose(fileHandle_p);
168
169 /* resolve id's : */
170
171 Finley_Mesh_resolveNodeIds(mesh_p);
172
173 /* rearrange elements: */
174
175 Finley_Mesh_prepare(mesh_p);
176 printf ("nodes read!\n");
177
178 /* that's it */
179 printf("timing: reading mesh: %.4e sec\n",Finley_timer()-time0);
180 if (Finley_ErrorCode!=NO_ERROR) Finley_Mesh_dealloc(mesh_p);
181 return mesh_p;
182 }
183 /*
184 * $Log$
185 * Revision 1.3 2005/07/22 03:53:08 jgs
186 * Merge of development branch back to main trunk on 2005-07-22
187 *
188 * Revision 1.2 2005/07/08 04:07:54 jgs
189 * Merge of development branch back to main trunk on 2005-07-08
190 *
191 * Revision 1.1.1.1.2.2 2005/07/18 10:34:54 gross
192 * some informance improvements when reading meshes
193 *
194 * Revision 1.1.1.1.2.1 2005/06/29 02:34:53 gross
195 * some changes towards 64 integers in finley
196 *
197 * Revision 1.1.1.1 2004/10/26 06:53:57 jgs
198 * initial import of project esys2
199 *
200 * Revision 1.1.1.1 2004/06/24 04:00:40 johng
201 * Initial version of eys using boost-python.
202 *
203 *
204 */
205

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